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High-pressure jet grouting anchor cable drilling tool capable of preventing steel strands from being wound and construction method
The invention provides a high-pressure jet grouting anchor cable drilling tool capable of preventing winding of steel strands and a construction method, and belongs to the technical field of deep foundation pit supporting construction.The drilling tool comprises a jet grouting drill rod, a jet grouting drill bit, a step-shaped protrusion, an anchor disc, a resistance increasing plate and an anchorage device, the jet grouting drill bit is connected with the jet grouting drill rod, and two nozzles, a drill rod connector and a pressure bearing are arranged on the jet grouting drill bit; the pressure bearing is sleeved with a bearing outer sleeve, the drill rod connector is suitable for being connected with a rotary spraying drill rod, the step-shaped protrusion is arranged in the middle of the rotary spraying drill bit and located on the side, close to the rotary spraying drill rod, of the pressure bearing, a penetrating hole is formed in the anchor disc, a slurry overflowing groove is formed in the end of the anchor disc, a passing hole and a mounting hole are formed in the resistance increasing plate, and the resistance increasing plate is suitable for being connected with a foundation pit supporting structure. According to the high-pressure rotary jet grouting anchor cable drilling tool capable of preventing the steel strands from being wound and the construction method, the problem that the steel strands are wound on the drilling rod during drilling and rib inserting can be avoided, the rotary jet grouting anchor cable can smoothly pass through a hard interlayer or a hard stratum, and therefore the effective design length of the rotary jet grouting anchor cable is guaranteed.
本发明提供了一种防钢绞线缠绕高压旋喷锚索钻具及施工方法，属于深基坑支护施工技术领域，钻具包括旋喷钻杆、旋喷钻头、台阶状凸起、锚盘、增阻板和锚具，旋喷钻头与旋喷钻杆连接，旋喷钻头上设置有两个喷嘴、钻杆接头和压力轴承，压力轴承外圆周套接有轴承外套，钻杆接头适于连接旋喷钻杆，台阶状凸起设于旋喷钻头中部且位于压力轴承的靠近旋喷钻杆的一侧，锚盘内部具有穿入孔，端部具有溢浆槽，增阻板内部具有通过孔和安装孔，增阻板适于连接基坑支护结构。本发明提供的一种防钢绞线缠绕高压旋喷锚索钻具及施工方法，既能避免钻孔插筋时钢绞线缠绕钻杆问题的发生，又能使旋喷锚索顺利通过硬夹层或硬地层，从而保证旋喷锚索的有效设计长度。
High-pressure jet grouting anchor cable drilling tool capable of preventing steel strands from being wound and construction method
The invention provides a high-pressure jet grouting anchor cable drilling tool capable of preventing winding of steel strands and a construction method, and belongs to the technical field of deep foundation pit supporting construction.The drilling tool comprises a jet grouting drill rod, a jet grouting drill bit, a step-shaped protrusion, an anchor disc, a resistance increasing plate and an anchorage device, the jet grouting drill bit is connected with the jet grouting drill rod, and two nozzles, a drill rod connector and a pressure bearing are arranged on the jet grouting drill bit; the pressure bearing is sleeved with a bearing outer sleeve, the drill rod connector is suitable for being connected with a rotary spraying drill rod, the step-shaped protrusion is arranged in the middle of the rotary spraying drill bit and located on the side, close to the rotary spraying drill rod, of the pressure bearing, a penetrating hole is formed in the anchor disc, a slurry overflowing groove is formed in the end of the anchor disc, a passing hole and a mounting hole are formed in the resistance increasing plate, and the resistance increasing plate is suitable for being connected with a foundation pit supporting structure. According to the high-pressure rotary jet grouting anchor cable drilling tool capable of preventing the steel strands from being wound and the construction method, the problem that the steel strands are wound on the drilling rod during drilling and rib inserting can be avoided, the rotary jet grouting anchor cable can smoothly pass through a hard interlayer or a hard stratum, and therefore the effective design length of the rotary jet grouting anchor cable is guaranteed.
本发明提供了一种防钢绞线缠绕高压旋喷锚索钻具及施工方法，属于深基坑支护施工技术领域，钻具包括旋喷钻杆、旋喷钻头、台阶状凸起、锚盘、增阻板和锚具，旋喷钻头与旋喷钻杆连接，旋喷钻头上设置有两个喷嘴、钻杆接头和压力轴承，压力轴承外圆周套接有轴承外套，钻杆接头适于连接旋喷钻杆，台阶状凸起设于旋喷钻头中部且位于压力轴承的靠近旋喷钻杆的一侧，锚盘内部具有穿入孔，端部具有溢浆槽，增阻板内部具有通过孔和安装孔，增阻板适于连接基坑支护结构。本发明提供的一种防钢绞线缠绕高压旋喷锚索钻具及施工方法，既能避免钻孔插筋时钢绞线缠绕钻杆问题的发生，又能使旋喷锚索顺利通过硬夹层或硬地层，从而保证旋喷锚索的有效设计长度。
High-pressure jet grouting anchor cable drilling tool capable of preventing steel strands from being wound and construction method
一种防钢绞线缠绕高压旋喷锚索钻具及施工方法
LI YOUDONG (author) / WANG GUOHUI (author) / LIANG LIANG (author) / ZHANG LIANG (author) / GAO CHUNLE (author) / LI LIANG (author) / LIU SHUANGCHEN (author) / ZHANG HUIXING (author) / SHI XIAONAN (author) / ZHANG SHUCAI (author)
2023-09-08
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
High-pressure jet grouting anchor cable end, drilling tool and construction method
| European Patent Office | 2024